JP2006318602A - Recording control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem: when music data inputted continuously are recorded in a file format and the data input rate is increased, the processing cannot catch up with the rate when changing over a musical piece, and data lack occurs. <P>SOLUTION: In a recording control method for recording the continuously inputted music data in a recording medium in the file format for each musical piece, when the changeover of a musical piece occurs, the final data of the preceding musical piece stored in a music data storage part 3 is written in the recording medium 6, and after that, musical piece change-over file manipulation is performed further. Buffer referring time during musical piece change-over processing is shortened by performing (distributing the processing) a part of the musical piece change-over file manipulation during the time other than the musical piece change-over processing. The performance of a recording function can be improved to a rise in an input amount of data within a fixed period of time due to higher speeding and improvement to higher sound quality without raising processing speed of a system controller 4 and an access rate to the recording medium 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording control method for recording music data continuously input from a music playback device or the like in a file format for each song on a recording medium formatted by a file system.

  As a recording device for recording music data continuously input from a music playback device in a file format on a recording medium formatted by a file system, a hard disk player, a CD-R (Compact Disc-Recordable) player, a digital audio player, etc. Is popular.

  The recording apparatus includes a data control unit that encodes and encrypts music data, and a system controller that performs control for writing music data to a recording medium in response to a write request from the data control unit. Data transfer between the data control unit and the system controller is performed via the music data storage unit.

  FIG. 1 is a block diagram showing a configuration of a general recording apparatus. In FIG. 1, reference numeral 1 denotes a music data output device that outputs a voice signal or music data. Reference numeral 2 denotes a data control unit including means for compressing or encrypting input music data and means for writing to the music data storage unit 3. A music data storage unit 3 stores compressed or encrypted music data. Reference numeral 4 denotes a system controller provided with control means for reading out music data stored in the music data storage unit 3 and writing it in the recording medium 6 by controlling the recording medium interface 5. Reference numeral 5 denotes a recording medium interface for accessing the recording medium 6. Reference numeral 6 denotes a recording medium formatted with a file system.

  When performing a recording operation, the data control unit 2 encodes or encrypts music data continuously input from the music data output device 1 and then stores the data in the music data storage unit 3 for each predetermined size. The music data storage unit 3 is divided into a plurality of buffers # 1, # 2, and # 3, and the data control unit 2 switches the order of writing. When the remaining amount of the music data storage unit 3 runs out, the system controller 4 reads the music data in the music data storage unit 3 and writes the music data to the recording medium 6 via the recording medium interface 5. In this way, recording is realized for continuous input.

  Hereinafter, the processing procedure of the recording operation in the prior art will be described with reference to FIGS. FIG. 10 is a flowchart showing processing during recording operation in the system controller 4. FIG. 11 is a flowchart of the file operation step when the music switching occurs in the system controller 4.

  In step S71, the system controller 4 enters a loop during recording. In step S72, the system controller 4 determines whether or not switching of music has occurred. If no song switching has occurred, the process proceeds to step S73, and all the music data in the buffer of the music data storage unit 3 is written into the recording medium 6. On the other hand, when it is determined that switching of music occurs, the process proceeds to step S74, and the final data of the previous music in the music data storage unit 3 is written in the recording medium 6. When there is music switching information in the music data or when a user requests to switch music, the music data storage unit 3 stores two music data, that is, the last data of the previous music and the head of the next music. Data is stored. Next, in step S75, a music switching file operation is executed.

  This music switching file operation is performed as shown in FIG. That is, in step S81, the previous music file closing process for ending the data file generation of the previous music is executed. Next, in step S82, a previous song key information writing process for writing key information for decrypting the previous song file is executed. Next, in step S83, a previous song information writing process for creating a previous song information file is executed. Next, in step S84, a next music file open process for generating a data file of the next music is executed. Next, the process proceeds to step S76 in FIG. 10, and the top data of the next song is written to the recording medium 6.

  By repeating the above recording operation, a function for recording music data that is continuously input as a file for each song is realized.

  By the way, when the amount of input data for a certain time increases as the recording speed increases or the sound quality increases, the time for the system controller 4 to refer to the music data in the music data storage unit 3 relatively increases. As a result, the data control unit 2 overwrites the music data in the music data storage unit 3 being referenced by the system controller 4, and unintended music data is written to the recording medium 6, so that there is a high probability that recording will fail. Become.

In view of this, there has been proposed a contrivance for avoiding a recording failure by reducing the amount of input data or temporarily stopping the input before music data is lost due to processing failure (see, for example, Patent Document 1). .
Japanese Unexamined Patent Publication No. 2000-123477 (pages 12-14, FIG. 3)

  In the conventional technique, when the amount of input data for a certain time increases as the recording speed increases or the sound quality increases, the process of writing the final data of the previous song in step S74 to the recording medium 6 and the step About the music switching file operation in step S75 performed during the process of writing the first data of the next music in S76 to the recording medium 6, the time for the system controller 4 to refer to the buffer of the music data storage unit 3 becomes long. . As a result, the process of the system controller 4 cannot catch up with the write request, and the probability of recording failure increases. Increasing the processing speed of the system controller 4 and the access speed to the recording medium 6 facilitates the response, but the cost increase accompanying the speed increase is inevitable.

  A recording control method according to the present invention is a recording control method for recording continuously input music data in a file format for each song on a recording medium formatted by a file system. When a song switching occurs, Write the last data of the previous song stored in the music data storage unit to the recording medium, then write the first data of the next song stored in the music data storage unit to the recording medium, and then the song switching file An operation is executed.

  According to this, the music data storage unit at the time of the music switching file operation is executed by performing the writing process of the first data of the next music immediately after the final data writing process of the previous music when the music switching occurs. The reference time can be shortened. Therefore, the recording operation can be executed without increasing the processing speed of the system controller or the access speed to the recording medium in response to an increase in the amount of input data within a certain time due to, for example, higher speed or higher sound quality.

In the above, the song switching file operation is
A previous song file closing process for ending generation of a previous song data file recorded on the recording medium;
A previous song key information writing process for writing key information of the previous song to the authentication area of the recording medium;
Including the previous song information writing process for writing the song information of the previous song to the file,
The next song file open process for generating the next song file on the recording medium is executed between the writing of the last data of the previous song to the recording medium and the writing of the first data of the next song to the recording medium. It shall be.

  When writing the first data of the next song immediately after the writing process of the last data of the previous song, at the start of the writing process of the first data of the next song, at least the next song file that generates the next song file on the recording medium Open processing is required.

In the above, the song switching file operation is
A previous song file closing process for ending generation of a previous song data file recorded on the recording medium;
A previous song key information writing process for writing key information of the previous song to the authentication area of the recording medium;
Including the previous song information writing process for writing the song information of the previous song to the file,
The next song file opening process for generating the next song file on the recording medium may be executed in an idle time before the song switching occurs.

  Further, in the above, the previous music key information writing process may be executed in a free time before the music switching occurs.

In the above, the song switching file operation is
A previous song key information writing process for writing key information of the previous song to the authentication area of the recording medium;
Write the previous song information writing process to write the song information of the previous song to the file,
A next song file open process for generating a file of the next song on the recording medium,
The previous song file closing process may be executed in a free time after the switching of the song.

  Further, in the above, the previous music piece information writing process may be executed in an idle time after the switching of the music piece.

  According to these, the music switching file operation is executed in a time zone other than when the music switching occurs and the processing is distributed, so that the time required for the processing to be performed when the music switching occurs can be shortened.

  In addition, when the previous song file closing process is executed in a free time after the switching of the song, the music data stored in the music data storage unit is written to the recording medium after the writing request is notified. Only when the delay time until the start becomes a predetermined time or more, the previous music file closing process may be executed in a free time after the switching of the music.

  In addition, when the previous song information writing process is executed in the idle time after the song switching occurs, the music data stored in the music data storage unit is notified to the recording medium after the writing request is notified. Only when the delay time until the start of writing becomes a predetermined time or more, the previous music piece information writing process may be executed in a free time after the switching of the music piece.

  According to this, in consideration of the delay time until the music data stored in the music data storage unit starts to be written to the recording medium, it is unnecessary to delay the processing only when the delay time exceeds a certain value. Can prevent delays in file generation.

  According to the present invention, the performance of the recording function is improved without increasing the processing speed of the system controller and the access speed to the recording medium in response to an increase in the amount of input data within a certain time due to higher speed and higher sound quality. Can be made.

  Embodiments of a recording control method in a recording apparatus according to the present invention will be described below in detail with reference to the drawings.

(Embodiment 1)
As the configuration of the recording apparatus according to Embodiment 1 of the present invention, the configuration of FIG. 1 used in the description of the conventional technique is applied.

  First, the processing procedure of the data control unit 2 during the recording operation will be described based on the flowchart shown in FIG.

In step S1, when the music data is input from the music data output device 1, the data control unit 2 proceeds to step S2 to start recording.
In step S2, recording processing (encoding and encryption) is performed on the input music data for each predetermined size, and then in step S3, the encrypted data is stored in the buffer of the music data storage unit 3. In step S4, it is monitored whether or not the remaining amount of the buffer is exhausted. When the remaining amount of the buffer is exhausted, a request to write the music data in the buffer to the recording medium 6 is transmitted to the system controller 4. Next, in step S6, the write buffer is updated (repeated).

  More specifically, when the remaining capacity of the first buffer # 1 is exhausted, a request to write music data in the first buffer # 1 is transmitted and accumulation in the second buffer # 2 is started. When the remaining capacity of the second buffer # 2 runs out, a request for writing music data in the second buffer # 2 is transmitted and accumulation in the third buffer # 3 is started. Furthermore, when the remaining capacity of the third buffer # 3 runs out, a request for writing music data in the third buffer # 3 is transmitted, and accumulation in the first buffer # 1 is started again.

  The above processing is repeatedly executed while music data is being input.

  Next, the processing procedure of the system controller 4 during the recording operation will be described based on the flowchart shown in FIG.

  When recording is started, the system controller 4 enters a recording loop in step S11, and waits for a write request from the data control unit 2 in step S12. When a write request is received from the data control unit 2, it is determined in step S13 whether or not song switching has occurred. If no song switching has occurred, the process proceeds to step S14, and all the music data in the designated buffer is written to the recording medium 6. After the completion, it again waits for a write request from the data control unit 2 (step S12).

  On the other hand, if there is a change of music, the final data of the previous music and the top data of the next music are stored in the buffer. At this time, the process proceeds to step S15, and the final data of the previous music is written to the recording medium 6. Next, in step S16, a next music file open process for generating a data file of the next music is performed. The processing in step S16 corresponds to step S84 in FIG. 11 in the case of the prior art, and is executed in advance. Next, in step S17, the head data of the next song is written to the recording medium 6. This completes the buffer reference. Then, the process proceeds to the music switching file operation process in step S18.

  The music switching file operation in step S18 is performed as shown in FIG. That is, in step S21, a previous song file closing process for ending the previous song data file generation is executed. Next, in step S22, a previous song key information writing process for writing key information for decrypting the previous song file is executed. Next, in step S23, a previous song information writing process for creating a previous song information file is executed.

  In the prior art, as shown in FIG. 10, the last data of the previous music is written to the recording medium 6 (step S74) and the first data of the next music is written to the recording medium 6 (step S76). The song switching file operation (step S75) is executed. Corresponding to this, in the present embodiment, after writing the final data of the previous song to the recording medium 6 (step S15), prior to the execution of the song switching file operation (step S18), The first data is written to the recording medium 6 (step S17). However, if the file is not opened due to file system restrictions, data cannot be written to the file unless the file is opened. Therefore, only the next song file open process (step S16) writes the first data of the next song to the recording medium 6. It is executed before (Step S17).

  As described above, according to the recording control method of the present embodiment, the time for referring to the buffer during execution of the music switching file operation by the system controller 4 is shortened, and the possibility of data loss of the recording device due to buffer overwriting is reduced. can do.

  Thus, for example, in response to an increase in the amount of input data within a certain time due to higher speed or higher sound quality, the recording operation is executed without increasing the processing speed of the system controller 4 or the access speed to the recording medium 6. Can do.

(Embodiment 2)
As for the configuration of the recording apparatus according to the second embodiment of the present invention, the configuration shown in FIG. Moreover, since the process of the data control part 2 is the same as that of FIG. 2 of Embodiment 1, description is abbreviate | omitted.

  The processing procedure of the system controller 4 during the recording operation of the present embodiment will be described based on the flowchart shown in FIG.

  When recording is started, the system controller 4 enters a recording loop in step S31, and waits for a write request from the data control unit 2 in step S32. When the write request from the data control unit 2 has not been received, the process proceeds to step S33, where it is determined whether or not the file for recording the next song is open. If not, the process proceeds to step S34. Then, the next song file opening process for generating the data file of the next song is executed. That is, the next song file open process is executed in the idle time before the song switching occurs. The process in step S34 corresponds to step S84 in FIG. 11 in the case of the conventional technique, and is executed in the idle time before the switching of music. When the execution of the next song file opening process is completed, the writing request from the data control unit 2 is again waited (step S32).

  On the other hand, when there is a write request from the data control unit 2, the process proceeds to step S35, and it is determined whether or not switching of music has occurred. If no song switching has occurred, the process advances to step S36 to write all the music data in the designated buffer to the recording medium 6. After the completion, the process waits for a write request from the data control unit 2 again (step S32).

  On the other hand, if there is a change of music, the final data of the previous music and the top data of the next music are stored in the buffer. At this time, the process proceeds to step S37 to write the final data of the previous song on the recording medium 6. At this time, the next music file open processing has already been completed (step S34). Next, in step S38, the head data of the next song is written to the recording medium 6. This completes the buffer reference. Then, the process proceeds to the music switching file operation process in step S39.

  The music switching file operation in step S39 is performed as shown in FIG. That is, in step S41, the previous music file closing process for ending the data file generation of the previous music is executed. Next, in step S42, a previous song key information writing process for writing key information for decrypting the previous song file is executed. Next, in step S43, previous song information writing processing for creating a song information file of the previous song is executed. These steps are the same as those in FIG. 4 in the first embodiment.

  As described above, in the present embodiment, the next song file open process that has been executed when a song change has occurred in the past is performed within a write request waiting time other than when a song change occurs, that is, It is characterized by being executed in the idle time before the occurrence of switching. As a result, the processing time when the music controller is switched in the system controller 4 is shortened, and the delay time from when the write request from the data control unit 2 is generated until the system controller 4 writes to the recording medium 6 is shortened.

  As a result, for example, it is possible to reduce the probability that the processing failure of the system controller will occur due to an increase in the amount of input data within a certain time due to higher speed and higher sound quality.

  In this embodiment, the next song file opening process (step S34) related to the song switching file operation is shown to be executed at times other than the song switching, but the previous song key information related to the song switching file operation is shown. The writing process (step S42) may be executed at times other than when the music is switched. In this case as well, the same effect of shortening the processing time of the music switching file operation can be obtained.

(Embodiment 3)
FIG. 7 is a block diagram showing a configuration of a recording apparatus according to Embodiment 3 of the present invention. In FIG. 7, reference numeral 7 indicates that when a write request is issued from the data control unit 2 to the system controller 4, if the delay time until the music data is written to the recording medium 6 is longer than a certain time, the music is switched at that time. This is a song switching file operation request saving unit for saving (queuing) file operation requests. At this time, the previous song file closing process is not performed at this point and is postponed.

  In the recording apparatus according to the present embodiment, the processing of the data control unit 2 is the same as that in FIG.

  The processing procedure of the system controller 4 during the recording operation of the present embodiment will be described based on the flowchart shown in FIG.

  When recording is started, the system controller 4 enters a recording loop in step S51, and enters a waiting state for a write request from the data control unit 2 in step S52. If a write request from the data control unit 2 has not been received, the process proceeds to step S53 to determine whether there is a previous song file close process already saved (queued) in the song switching file operation request saving unit 7. Judgment is made (this queuing is performed in step S64 in FIG. 9). If there is a previous song file closing process that has already been saved, the process proceeds to step S54, and the delay time from when the write request from the data control unit 2 is generated until the system controller 4 writes the music data to the recording medium 6 is referred. To do. If there is no delay time, the process proceeds to step S55, and the previous song file closing process saved in the song switching file operation request saving unit 7 is executed. When the execution of the previous music file closing process is finished, the writing control request from the data control unit 2 is again waited (step S52).

  On the other hand, when there is a write request from the data control unit 2, the process proceeds to step S56, where it is determined whether or not a song switching has occurred. If no song switching has occurred, the process advances to step S57 to write all the music data in the designated buffer to the recording medium 6. After the completion, the process waits for a write request from the data control unit 2 again (step S52).

  On the other hand, if there is a change of music, the final data of the previous music and the top data of the next music are stored in the buffer. At this time, the process proceeds to step S58, and the final data of the previous music is written to the recording medium 6. Next, in step S59, the top data of the next song is written to the recording medium 6. This completes the buffer reference. Then, the process proceeds to the music switching file operation process in step S60.

  The music switching file operation in step S60 is performed as shown in FIG. That is, in step S61, the delay time from when the write request from the data control unit 2 is generated until the system controller 4 writes the music data to the recording medium 6 is referred to. If the delay time is equal to or longer than a certain time, the previous music file closing process is not performed at this time, and the process proceeds to step S64, and the previous music file closing process is saved in the music switching file operation request saving unit 7. On the other hand, if there is no delay time or less than a certain time, the process proceeds to step S62 to determine whether or not there is a previous music file closing process already saved in the music switching file operation request saving unit 7. If there is a previous music file closing process that has already been saved, the process proceeds to step S64, but if there is no previous music file closing process saved to the music switching file operation request saving unit 7, the process proceeds to step S63, and at this point Perform song file close processing. That is, if there is time, the previous music file closing process is immediately executed.

  Next, in step S65, a previous song key information writing process for writing key information for decrypting the previous song file is executed. Next, in step S66, a previous song information writing process for creating a previous song information file is executed. Next, in step S67, the next music file open process is executed.

  As described above, in the present embodiment, the previous song file closing process, which has been conventionally performed when a song switch occurs, is executed within the write request waiting time after the song switch occurs. It is characterized by As a result, the processing time when the music controller is switched in the system controller 4 is shortened, and the delay time from when the write request from the data control unit 2 is generated until the system controller 4 writes to the recording medium 6 is shortened.

  As a result, for example, it is possible to reduce the probability that the processing failure of the system controller will occur due to an increase in the amount of input data within a certain time due to higher speed and higher sound quality.

  In addition, the delay time from when a write request is generated from the data control unit 2 to when the data is written to the recording medium 6 is monitored, and the processing is delayed only when the delay time exceeds a certain level, thereby generating a file unnecessarily. Can be delayed.

  In the present embodiment, the previous song file closing process of the song switching file operation (FIG. 9) is shown to be executed after the song switching. However, the previous song information writing process in step S66 is performed. Even if it is executed at other times, the effect of shortening the processing time of the music switching file operation can be obtained.

  The recording control method of the present invention is useful in a hard disk player, a CD-R player, a digital audio player, and the like that record music data continuously input from a music playback device or the like in a file format on a recording medium formatted by a file system. Therefore, performance can be expected without increasing the cost of the product.

1 is a block diagram showing a configuration of a recording apparatus according to Embodiment 1 of the present invention and a conventional technique. The flowchart which shows operation | movement of the data control part at the time of recording operation of the recording device in Embodiment 1 of this invention. The flowchart which shows operation | movement of the system controller at the time of the recording operation of the recording device in Embodiment 1 of this invention. The flowchart which shows the operation | movement of the music switching file operation by the system controller of the recording device in Embodiment 1 of this invention. The flowchart which shows operation | movement of the system controller at the time of the recording operation of the recording device in Embodiment 2 of this invention. The flowchart which shows the operation | movement of the music switching file operation by the system controller of the recording device in Embodiment 2 of this invention The block diagram which shows the structure of the recording device in Embodiment 3 of this invention. The flowchart which shows operation | movement of the system controller at the time of the recording operation of the recording device in Embodiment 3 of this invention. The flowchart which shows the operation | movement of the music switching file operation by the system controller of the recording device in Embodiment 3 of this invention. The flowchart which shows the operation | movement of the system controller at the time of the recording operation of the recording device in a prior art The flowchart which shows the operation | movement of the music switching file operation by the system controller of the recording device in a prior art

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Music data output device 2 Data control part 3 Music data storage part 4 System controller 5 Recording medium interface 6 Recording medium 7 Song switching file operation request saving part

Claims (8)

A recording control method for recording continuously input music data in a file format for each song on a recording medium formatted with a file system,
When song switching occurs, the last data of the previous song stored in the music data storage unit is written to the recording medium, and then the first data of the next song stored in the music data storage unit is written to the recording medium A recording control method, wherein a song switching file operation is executed after the writing. The song switching file operation is
A previous song file closing process for ending generation of a previous song data file recorded on the recording medium;
A previous song key information writing process for writing key information of the previous song to the authentication area of the recording medium;
Including the previous song information writing process for writing the song information of the previous song to the file,
The next song file open process for generating the next song file on the recording medium is executed between the writing of the last data of the previous song to the recording medium and the writing of the first data of the next song to the recording medium. The recording control method according to claim 1. The song switching file operation is
A previous song file closing process for ending generation of a previous song data file recorded on the recording medium;
A previous song key information writing process for writing key information of the previous song to the authentication area of the recording medium;
Including the previous song information writing process for writing the song information of the previous song to the file,
The recording control method according to claim 1, wherein the next song file opening process for generating the next song file on the recording medium is executed in an idle time before the switching of the song.   4. The recording control method according to claim 3, wherein the previous song key information writing process is executed in a free time before the switching of the song. The song switching file operation is
A previous song key information writing process for writing key information of the previous song to the authentication area of the recording medium;
Write the previous song information writing process to write the song information of the previous song to the file,
A next song file open process for generating a file of the next song on the recording medium,
The recording control method according to claim 1, wherein the previous song file closing process is executed in an idle time after the switching of the song.   6. The recording control method according to claim 5, wherein the previous song information writing process is executed in an idle time after occurrence of switching of the songs.   The previous song file closing process is performed only when a delay time from the notification of the write request to the start of writing of the music data stored in the music data storage unit to the recording medium exceeds a predetermined time. The recording control method according to claim 5, wherein the recording control method is executed in an idle time after occurrence of switching of the music.   The previous song information writing process is performed only when a delay time from when the writing request is notified to when the music data stored in the music data storage unit starts to be written to the recording medium becomes a predetermined time or more. 7. The recording control method according to claim 6, wherein the recording control method is executed in an idle time after the switching of the music.

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